Well if you published that info here, there would be such a demand that they wouldn't be offering the best rate for long! But I would certainly recommend shopping around, and if you're in London using one of the smaller "No Commission" exchanges. It amazes me how people will use some of the big name banks and agencies, which give lousy rates and charge commission, when they could buy the same amount of foreign currency for less a few doors down the street. After all, bank notes are simply bank notes, wherever you buy them.